Screw-driver.



I H. W. POMEROY.

SCREW DRIVER. APPLICATION FILED MAY 12. 1915.

Patented $6M. 11,1917.

(Jumwdoi HENRY POIVIEROY, or. NORTHAMPTON, MASSACHUSETTS.

scnEw-Darvna.

Specification of Letters Patent.

Patented Sept. 11, 1917.

Application filed may- 12, 1915. Serial No. 27,624.

Toall whom itmay concern:

Be it known that I, 1V- PoMnRoY, a citizen of the United. States, residing at Northamptoinin the county of" Hampshire and State. ot- Massachusetts, have: invented: certain new and useful Improvements in Screw-Drivers of which the. following is a specification.

This. invention. relates to an improved screw driver and the principal object of the invention is to provide a screw driver. of the removable bit type which is so constructed that the bit carrying socket may be caused; to rotate with the handle when. the. handle is turning: in a selected direction. and to remain stationary when the. handle, is turning. in the opposite direction.

Another object of the invention is to. provide. improved means tori-eleasably holdg the rotation controlling pawls in a set position. i 1

Another object of the invention istoprovide improved meanstor releasablyholding the bit in the socket.

Another object of the invention is to provide a tool of the character described which will consist of a comparatively few number of parts and which will be simple to operate and not liable to easily get out of order or need repair.

This invention is illustrated in the accompanying drawings, wherein Figure 1 is a view showing the improved screw driver in elevation.

Fig. 2 is a view showing the screw driver in section the handle being moved to an adjusted position.

Fig. 3 is a fragmentary view of the socket member, the upper portion thereof being broken away.

Fig. 4: is a sectional view taken along the line 4.% of Fig. 2.

Fig. -5 is a sectional view-taken along the line 55 of Fig. 2.

Fig. 6 is a fragmentary sectional view of the socket member showing the manner of mounting the pawls therein.

Fig. 7 is a longitudinal sectional view through tang shown embedded in the handle in Fig. 2.

The handle 10 of this screw driver is provided with a cutout forming a housing 11 one wall of which is broken away as shown at 12 in Fig. 1 to permit the handle to be moved from the position shown in Fig. 1 to that shown in Fig. 2. The hinged prong or bracket 13 is driven into the handle and may be releasably held in place. by means of the pins 14-. passing between the arms 15 of this bracket the arms terminating in the bearings 16 which carry the pivot pin 17.

The socket 18 is provided with a head 19 from which there extends ahinged ear 20 positioned. betweenthe bearings 16 and rotatably mounted upon the pivot pin '17. The bracket is formed of resilient material and one of the hinged cars 16 is provided with grooves. 21 into which the ribs will fit. These grooves 21 are located so that when the handle isin the position shown in Fig. 1 the ribs 22 will tit into one of the grooves and when thehandle is in the position shown in Fig. the. ribs will fit into the second groove. Since the bracket is formed of resilient material it will be rather dii'licult to move the handle from one position to another and therefore. there will be no danger ot the handle accidentally slippingt'rom the position: shown inFig. 1 to that shown in Flig. '2 while being. used.

The socket 18 is separate from the head 19. and isprovided with a collar 23 in which notches 2A are cut to receive the pawls 25 and 26. These pawls 25 and 26 are beveled in opposite directions as clearly shown in Fig. 1 so that when one of the pawls is in an operative position the socket will. be ro tated in one direction with the handle and when the second pawl is in an operative position and the first pawl inoperative the socket will be rotated in the opposite direction with the handle. These pawls are piv otally mounted as shown in Fig. 6 and are normally held in an operative position by means of the springs 27 which engage the inner ends of the heads 28 and 29. T heretore the pawls will be normally positioned in the socket or notches 24 of the collar 23 and some means must be provided for selectively moving one of thepawls to an inoperative position.

In order to do this I have provided a sleeve 30' which is rotatablymounted upon the head 19 and provided with an internal flange 31 positioned beneath the collar 28 and thus serving as means for holding the socket in engagement with the head 19 as well as serving as means for selectively holding one of the pawls in an inoperative position. This sleeve is releasably held in engagement with the head 19 by means of the screw 32 positioned in the transversely extending slot 33 and it will thus be seen that while the sleeve will be held upon the heads it will be permitted to have a limited amount of rotary movement in order to move the sleeve over one of the heads of the two pawls. \Vhen the sleeve is in the position shown in Fig. 1 both of the pawls will be in an operative position and thus the socket will turn with the handle in either direction but if the sleeve is moved to cover the head 28 the pawl 25 will be swung to an inoperative position. In the same manner if the sleeve is turned to cover the head 29 of pawl 26 this pawl will be rendered inoperative and pawl 25 left in an operative position. Therefore both pawls can be left operative or either one of them can be moved to an inoperative position.

It is also desired to have the bit 34 securely held in the socket and therefore the locking sleeve 35 has been provided. This locking sleeve 35 is rotatably mounted upon the socket by means of the screw 36 passing through the slot 87. The socket and the locking sleeve are provided with rectangular openings which register when the bit is put in place. After the bit has been put in place as shown in Fig. 2 the locking sleeve will be moved as far as permitted by the screw 36 thus causing the corner portions of the rectangular openings in the sleeve to be covered and prevent the bit from passing out of the socket until the locking sleeve is turned to the original position. It is of course obvious that any other type of bit could be used such for instance as an auger or the like, a screw driver bit being simply shown as one type of bit which could be used in connection with this'handle.

What is claimed is A brace of the character described comprising a handle, an article engaging socket provided with a head having a hinge ear extending therefrom, a tang driven into said handle and provided with resilient arms extending in spaced relation and terminating at their free ends in hinge ears positioned in a pocket formed in the handle and open at the side and end of the handle, one ear of said tang being provided with groovesand the ear of said socket being provided with a rib for fitting into the grooves of the ear of said tang, securing means passing through the handle and between the arms of the tang, and a pin passing through registering openings in said ears for pivotally mounting the ear of the socket between the ears of said tang.

. In testimony whereof I affix my signature in presence of two witnesses.

HENRY W. POMEROY.

Witnesses: Y

CLARENCE D. CHASE, J ENNIE C. PRATT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. v 

